diff --git a/build/boards/chip_list.json b/build/boards/chip_list.json
index 726472d1e..68658103d 100644
--- a/build/boards/chip_list.json
+++ b/build/boards/chip_list.json
@@ -1,6 +1,6 @@
 {
   "cv181x": {
-    "cv181x": ["cv181x", "cv1811h", "cv1811c", "cv1810c", "cv1810h", "cv1812cp", "cv1812h", "cv1813h", "sg2000", "sg2002"]
+    "cv181x": ["cv181x", "cv1811h", "cv1811c", "cv1810c", "cv1810h", "cv1812cp", "cv1812cpa", "cv1812h", "cv1813h", "sg2000", "sg2002"]
   },
 
   "cv180x": {
diff --git a/build/boards/cv181x/cv1812cpa_wevb_0006a_spinand/config.json b/build/boards/cv181x/cv1812cpa_wevb_0006a_spinand/config.json
new file mode 100644
index 000000000..d809cad9f
--- /dev/null
+++ b/build/boards/cv181x/cv1812cpa_wevb_0006a_spinand/config.json
@@ -0,0 +1,9 @@
+{
+    "ddr_cfg_list": [
+        "",
+        "ddr3_1866_x16",
+        "ddr3_2133_x16",
+	"ddr_auto_x16"
+    ],
+    "board_information": "CA53 + SPINAND 256MB + BGA SIP 256MB"
+}
diff --git a/build/boards/cv181x/cv1812cpa_wevb_0006a_spinand/cv1812cpa_wevb_0006a_spinand_defconfig b/build/boards/cv181x/cv1812cpa_wevb_0006a_spinand/cv1812cpa_wevb_0006a_spinand_defconfig
new file mode 100644
index 000000000..c6c6c30da
--- /dev/null
+++ b/build/boards/cv181x/cv1812cpa_wevb_0006a_spinand/cv1812cpa_wevb_0006a_spinand_defconfig
@@ -0,0 +1,35 @@
+CONFIG_CHIP_cv1812cpa=y
+CONFIG_BOARD_wevb_0006a_spinand=y
+CONFIG_DDR_CFG_ddr3_1866_x16=y
+CONFIG_ARCH="arm64"
+CONFIG_CC_OPTIMIZE_FOR_SIZE=y
+CONFIG_CROSS_COMPILE_KERNEL="aarch64-linux-gnu-"
+CONFIG_KERNEL_ENTRY_HACK=y
+CONFIG_KERNEL_ENTRY_HACK_ADDR="0x80108000"
+CONFIG_TOOLCHAIN_GLIBC_ARM64=y
+CONFIG_FLASH_SIZE_SHRINK=y
+CONFIG_BOOT_IMAGE_SINGLE_DTB=y
+CONFIG_STORAGE_TYPE_spinand=y
+CONFIG_SENSOR_GCORE_GC2053=y
+CONFIG_SENSOR_GCORE_GC2053_1L=y
+CONFIG_SENSOR_GCORE_GC2093=y
+CONFIG_SENSOR_GCORE_GC4653=y
+CONFIG_SENSOR_PIXELPLUS_PR2020=y
+CONFIG_SENSOR_SONY_IMX307=y
+CONFIG_SENSOR_SONY_IMX327=y
+CONFIG_UBOOT_2021_10=y
+CONFIG_KERNEL_SRC_5.10=y
+CONFIG_KERNEL_SRC="linux_5.10"
+CONFIG_KERNEL_LZMA=y
+CONFIG_SKIP_RAMDISK=y
+CONFIG_USE_4K_ERASE_SIZE_FOR_JFFS2=y
+CONFIG_SENSOR_TUNING_PARAM_cv181x_src_gcore_gc4653=y
+# CONFIG_ROOTFS_OVERLAYFS is not set
+CONFIG_TARGET_PACKAGE_DROPBEAR=y
+CONFIG_TARGET_PACKAGE_MTD-UTILS=y
+# CONFIG_TARGET_PACKAGE_RSYSLOG is not set
+# CONFIG_TARGET_PACKAGE_GATORD is not set
+CONFIG_ENABLE_FREERTOS=y
+CONFIG_ENABLE_RTOS_DUMP_PRINT=y
+CONFIG_DUMP_PRINT_SZ_IDX=17
+CONFIG_TARGET_PACKAGE_NTP=y
diff --git a/build/boards/cv181x/cv1812cpa_wevb_0006a_spinand/dts_arm64/cv1812cpa_wevb_0006a_spinand.dts b/build/boards/cv181x/cv1812cpa_wevb_0006a_spinand/dts_arm64/cv1812cpa_wevb_0006a_spinand.dts
new file mode 100644
index 000000000..d6ff6c4a6
--- /dev/null
+++ b/build/boards/cv181x/cv1812cpa_wevb_0006a_spinand/dts_arm64/cv1812cpa_wevb_0006a_spinand.dts
@@ -0,0 +1,10 @@
+/dts-v1/;
+#include "cv181x_base_arm.dtsi"
+#include "cv181x_asic_bga.dtsi"
+#include "cv181x_asic_spinand.dtsi"
+#include "cv181x_default_memmap.dtsi"
+
+/ {
+
+};
+
diff --git a/build/boards/cv181x/cv1812cpa_wevb_0006a_spinand/dts_riscv/cv1812cpa_wevb_0006a_spinand.dts b/build/boards/cv181x/cv1812cpa_wevb_0006a_spinand/dts_riscv/cv1812cpa_wevb_0006a_spinand.dts
new file mode 100644
index 000000000..04cdd308d
--- /dev/null
+++ b/build/boards/cv181x/cv1812cpa_wevb_0006a_spinand/dts_riscv/cv1812cpa_wevb_0006a_spinand.dts
@@ -0,0 +1,10 @@
+/dts-v1/;
+#include "cv181x_base_riscv.dtsi"
+#include "cv181x_asic_qfn.dtsi"
+#include "cv181x_asic_spinand.dtsi"
+#include "cv181x_default_memmap.dtsi"
+
+/ {
+
+};
+
diff --git a/build/boards/cv181x/cv1812cpa_wevb_0006a_spinand/linux/cvitek_cv1812cpa_wevb_0006a_spinand_defconfig b/build/boards/cv181x/cv1812cpa_wevb_0006a_spinand/linux/cvitek_cv1812cpa_wevb_0006a_spinand_defconfig
new file mode 100644
index 000000000..9439e06f2
--- /dev/null
+++ b/build/boards/cv181x/cv1812cpa_wevb_0006a_spinand/linux/cvitek_cv1812cpa_wevb_0006a_spinand_defconfig
@@ -0,0 +1,403 @@
+# CONFIG_SWAP is not set
+CONFIG_SYSVIPC=y
+CONFIG_POSIX_MQUEUE=y
+CONFIG_NO_HZ_IDLE=y
+CONFIG_HIGH_RES_TIMERS=y
+CONFIG_PREEMPT=y
+CONFIG_LOG_BUF_SHIFT=15
+CONFIG_CC_OPTIMIZE_FOR_SIZE=y
+# CONFIG_SYSFS_SYSCALL is not set
+# CONFIG_FHANDLE is not set
+# CONFIG_BUG is not set
+# CONFIG_BASE_FULL is not set
+# CONFIG_SIGNALFD is not set
+# CONFIG_AIO is not set
+# CONFIG_IO_URING is not set
+# CONFIG_ADVISE_SYSCALLS is not set
+# CONFIG_KALLSYMS is not set
+CONFIG_EMBEDDED=y
+# CONFIG_SLUB_DEBUG is not set
+CONFIG_ARM_LPAE=y
+CONFIG_SWP_EMULATE=y
+# CONFIG_VDSO is not set
+CONFIG_HAVE_ARM_ARCH_TIMER=y
+CONFIG_ARM_PSCI=y
+CONFIG_THUMB2_KERNEL=y
+CONFIG_FORCE_MAX_ZONEORDER=10
+# CONFIG_ATAGS is not set
+CONFIG_VFP=y
+CONFIG_NEON=y
+# CONFIG_SUSPEND is not set
+CONFIG_ARCH_CVITEK=y
+CONFIG_ARCH_CV181X=y
+CONFIG_ARCH_CVITEK_CHIP="cv181x"
+CONFIG_ARCH_CV181X_ASIC=y
+CONFIG_POWER_RESET=y
+# CONFIG_STACKPROTECTOR is not set
+CONFIG_MODULES=y
+CONFIG_MODULE_FORCE_LOAD=y
+CONFIG_MODULE_UNLOAD=y
+# CONFIG_LBDAF is not set
+# CONFIG_BLK_DEV_BSG is not set
+# CONFIG_IOSCHED_DEADLINE is not set
+# CONFIG_IOSCHED_CFQ is not set
+# CONFIG_MQ_IOSCHED_DEADLINE is not set
+# CONFIG_MQ_IOSCHED_KYBER is not set
+# CONFIG_COREDUMP is not set
+CONFIG_NET=y
+CONFIG_PACKET=y
+CONFIG_UNIX=y
+CONFIG_INET=y
+# CONFIG_INET_DIAG is not set
+# CONFIG_IPV6 is not set
+CONFIG_CFG80211=y
+CONFIG_RFKILL=y
+CONFIG_UEVENT_HELPER=y
+CONFIG_DEVTMPFS=y
+CONFIG_DEVTMPFS_MOUNT=y
+# CONFIG_ALLOW_DEV_COREDUMP is not set
+CONFIG_MTD=y
+CONFIG_MTD_CMDLINE_PARTS=y
+# CONFIG_MTD_OF_PARTS is not set
+CONFIG_MTD_BLOCK=y
+CONFIG_MTD_RAW_NAND=y
+CONFIG_MTD_NAND_PLATFORM=y
+CONFIG_MTD_NAND_CVSNFC=y
+CONFIG_MTD_SPI_NOR=y
+# CONFIG_MTD_SPI_NOR_USE_4K_SECTORS is not set
+CONFIG_SPI_CVI_SPIF=y
+CONFIG_MTD_UBI=y
+CONFIG_MTD_UBI_BLOCK=y
+CONFIG_NETDEVICES=y
+# CONFIG_NET_CORE is not set
+# CONFIG_NET_VENDOR_ALACRITECH is not set
+# CONFIG_NET_VENDOR_AMAZON is not set
+# CONFIG_NET_VENDOR_AQUANTIA is not set
+# CONFIG_NET_VENDOR_ARC is not set
+# CONFIG_NET_VENDOR_AURORA is not set
+# CONFIG_NET_VENDOR_BROADCOM is not set
+# CONFIG_NET_VENDOR_CADENCE is not set
+# CONFIG_NET_VENDOR_CAVIUM is not set
+# CONFIG_NET_VENDOR_CORTINA is not set
+# CONFIG_NET_VENDOR_EZCHIP is not set
+# CONFIG_NET_VENDOR_HUAWEI is not set
+# CONFIG_NET_VENDOR_INTEL is not set
+# CONFIG_NET_VENDOR_MARVELL is not set
+# CONFIG_NET_VENDOR_MICREL is not set
+# CONFIG_NET_VENDOR_MICROCHIP is not set
+# CONFIG_NET_VENDOR_MICROSEMI is not set
+# CONFIG_NET_VENDOR_NATSEMI is not set
+# CONFIG_NET_VENDOR_NETRONOME is not set
+# CONFIG_NET_VENDOR_NI is not set
+# CONFIG_NET_VENDOR_QUALCOMM is not set
+# CONFIG_NET_VENDOR_RENESAS is not set
+# CONFIG_NET_VENDOR_ROCKER is not set
+# CONFIG_NET_VENDOR_SAMSUNG is not set
+# CONFIG_NET_VENDOR_SEEQ is not set
+# CONFIG_NET_VENDOR_SOLARFLARE is not set
+# CONFIG_NET_VENDOR_SOCIONEXT is not set
+CONFIG_STMMAC_ETH=y
+# CONFIG_DWMAC_GENERIC is not set
+# CONFIG_NET_VENDOR_SYNOPSYS is not set
+# CONFIG_NET_VENDOR_VIA is not set
+# CONFIG_NET_VENDOR_WIZNET is not set
+CONFIG_CVITEK_PHY=y
+# CONFIG_USB_NET_DRIVERS is not set
+# CONFIG_WLAN_VENDOR_ADMTEK is not set
+# CONFIG_WLAN_VENDOR_ATH is not set
+# CONFIG_WLAN_VENDOR_ATMEL is not set
+# CONFIG_WLAN_VENDOR_BROADCOM is not set
+# CONFIG_WLAN_VENDOR_CISCO is not set
+# CONFIG_WLAN_VENDOR_INTEL is not set
+# CONFIG_WLAN_VENDOR_INTERSIL is not set
+# CONFIG_WLAN_VENDOR_MARVELL is not set
+# CONFIG_WLAN_VENDOR_MEDIATEK is not set
+# CONFIG_WLAN_VENDOR_RALINK is not set
+# CONFIG_WLAN_VENDOR_RSI is not set
+# CONFIG_WLAN_VENDOR_ST is not set
+# CONFIG_WLAN_VENDOR_TI is not set
+# CONFIG_WLAN_VENDOR_ZYDAS is not set
+CONFIG_INPUT_EVDEV=y
+# CONFIG_INPUT_KEYBOARD is not set
+# CONFIG_INPUT_MOUSE is not set
+# CONFIG_VT is not set
+# CONFIG_LEGACY_PTYS is not set
+CONFIG_SERIAL_8250=y
+CONFIG_SERIAL_8250_CONSOLE=y
+CONFIG_SERIAL_8250_NR_UARTS=5
+CONFIG_SERIAL_8250_RUNTIME_UARTS=5
+CONFIG_SERIAL_8250_DW=y
+CONFIG_HW_RANDOM=y
+CONFIG_I2C=y
+CONFIG_I2C_SMBUS=y
+CONFIG_I2C_CHARDEV=y
+CONFIG_I2C_DESIGNWARE_PLATFORM=y
+CONFIG_I2C_GPIO=y
+CONFIG_SPI=y
+# CONFIG_PTP_1588_CLOCK is not set
+CONFIG_CVITEK_PINCTRL_CV1835=y
+CONFIG_GPIOLIB=y
+CONFIG_GPIO_SYSFS=y
+CONFIG_GPIO_DWAPB=y
+CONFIG_POWER_RESET=y
+CONFIG_THERMAL=y
+CONFIG_THERMAL_NETLINK=y
+CONFIG_THERMAL_WRITABLE_TRIPS=y
+CONFIG_THERMAL_EMULATION=y
+CONFIG_WATCHDOG=y
+CONFIG_WATCHDOG_CORE=y
+# CONFIG_MEDIA_CEC_SUPPORT is not set
+CONFIG_MEDIA_SUPPORT=y
+# CONFIG_MEDIA_CONTROLLER is not set
+# CONFIG_DVB_NET is not set
+# CONFIG_DVB_DYNAMIC_MINORS is not set
+# CONFIG_RADIO_ADAPTERS is not set
+# CONFIG_CXD2880_SPI_DRV is not set
+# CONFIG_MEDIA_TUNER_SIMPLE is not set
+# CONFIG_MEDIA_TUNER_TDA18250 is not set
+# CONFIG_MEDIA_TUNER_TDA8290 is not set
+# CONFIG_MEDIA_TUNER_TDA827X is not set
+# CONFIG_MEDIA_TUNER_TDA18271 is not set
+# CONFIG_MEDIA_TUNER_TDA9887 is not set
+# CONFIG_MEDIA_TUNER_TEA5761 is not set
+# CONFIG_MEDIA_TUNER_TEA5767 is not set
+# CONFIG_MEDIA_TUNER_MSI001 is not set
+# CONFIG_MEDIA_TUNER_MT20XX is not set
+# CONFIG_MEDIA_TUNER_MT2060 is not set
+# CONFIG_MEDIA_TUNER_MT2063 is not set
+# CONFIG_MEDIA_TUNER_MT2266 is not set
+# CONFIG_MEDIA_TUNER_MT2131 is not set
+# CONFIG_MEDIA_TUNER_QT1010 is not set
+# CONFIG_MEDIA_TUNER_XC2028 is not set
+# CONFIG_MEDIA_TUNER_XC5000 is not set
+# CONFIG_MEDIA_TUNER_XC4000 is not set
+# CONFIG_MEDIA_TUNER_MXL5005S is not set
+# CONFIG_MEDIA_TUNER_MXL5007T is not set
+# CONFIG_MEDIA_TUNER_MC44S803 is not set
+# CONFIG_MEDIA_TUNER_MAX2165 is not set
+# CONFIG_MEDIA_TUNER_TDA18218 is not set
+# CONFIG_MEDIA_TUNER_FC0011 is not set
+# CONFIG_MEDIA_TUNER_FC0012 is not set
+# CONFIG_MEDIA_TUNER_FC0013 is not set
+# CONFIG_MEDIA_TUNER_TDA18212 is not set
+# CONFIG_MEDIA_TUNER_E4000 is not set
+# CONFIG_MEDIA_TUNER_FC2580 is not set
+# CONFIG_MEDIA_TUNER_M88RS6000T is not set
+# CONFIG_MEDIA_TUNER_TUA9001 is not set
+# CONFIG_MEDIA_TUNER_SI2157 is not set
+# CONFIG_MEDIA_TUNER_IT913X is not set
+# CONFIG_MEDIA_TUNER_R820T is not set
+# CONFIG_MEDIA_TUNER_MXL301RF is not set
+# CONFIG_MEDIA_TUNER_QM1D1C0042 is not set
+# CONFIG_MEDIA_TUNER_QM1D1B0004 is not set
+# CONFIG_DVB_STB0899 is not set
+# CONFIG_DVB_STB6100 is not set
+# CONFIG_DVB_STV090x is not set
+# CONFIG_DVB_STV0910 is not set
+# CONFIG_DVB_STV6110x is not set
+# CONFIG_DVB_STV6111 is not set
+# CONFIG_DVB_MXL5XX is not set
+# CONFIG_DVB_M88DS3103 is not set
+# CONFIG_DVB_DRXK is not set
+# CONFIG_DVB_TDA18271C2DD is not set
+# CONFIG_DVB_SI2165 is not set
+# CONFIG_DVB_MN88472 is not set
+# CONFIG_DVB_MN88473 is not set
+# CONFIG_DVB_CX24110 is not set
+# CONFIG_DVB_CX24123 is not set
+# CONFIG_DVB_MT312 is not set
+# CONFIG_DVB_ZL10036 is not set
+# CONFIG_DVB_ZL10039 is not set
+# CONFIG_DVB_S5H1420 is not set
+# CONFIG_DVB_STV0288 is not set
+# CONFIG_DVB_STB6000 is not set
+# CONFIG_DVB_STV0299 is not set
+# CONFIG_DVB_STV6110 is not set
+# CONFIG_DVB_STV0900 is not set
+# CONFIG_DVB_TDA8083 is not set
+# CONFIG_DVB_TDA10086 is not set
+# CONFIG_DVB_TDA8261 is not set
+# CONFIG_DVB_VES1X93 is not set
+# CONFIG_DVB_TUNER_ITD1000 is not set
+# CONFIG_DVB_TUNER_CX24113 is not set
+# CONFIG_DVB_TDA826X is not set
+# CONFIG_DVB_TUA6100 is not set
+# CONFIG_DVB_CX24116 is not set
+# CONFIG_DVB_CX24117 is not set
+# CONFIG_DVB_CX24120 is not set
+# CONFIG_DVB_SI21XX is not set
+# CONFIG_DVB_TS2020 is not set
+# CONFIG_DVB_DS3000 is not set
+# CONFIG_DVB_MB86A16 is not set
+# CONFIG_DVB_TDA10071 is not set
+# CONFIG_DVB_SP8870 is not set
+# CONFIG_DVB_SP887X is not set
+# CONFIG_DVB_CX22700 is not set
+# CONFIG_DVB_CX22702 is not set
+# CONFIG_DVB_S5H1432 is not set
+# CONFIG_DVB_DRXD is not set
+# CONFIG_DVB_L64781 is not set
+# CONFIG_DVB_TDA1004X is not set
+# CONFIG_DVB_NXT6000 is not set
+# CONFIG_DVB_MT352 is not set
+# CONFIG_DVB_ZL10353 is not set
+# CONFIG_DVB_DIB3000MB is not set
+# CONFIG_DVB_DIB3000MC is not set
+# CONFIG_DVB_DIB7000M is not set
+# CONFIG_DVB_DIB7000P is not set
+# CONFIG_DVB_DIB9000 is not set
+# CONFIG_DVB_TDA10048 is not set
+# CONFIG_DVB_AF9013 is not set
+# CONFIG_DVB_EC100 is not set
+# CONFIG_DVB_STV0367 is not set
+# CONFIG_DVB_CXD2820R is not set
+# CONFIG_DVB_CXD2841ER is not set
+# CONFIG_DVB_RTL2830 is not set
+# CONFIG_DVB_RTL2832 is not set
+# CONFIG_DVB_RTL2832_SDR is not set
+# CONFIG_DVB_SI2168 is not set
+# CONFIG_DVB_ZD1301_DEMOD is not set
+# CONFIG_DVB_CXD2880 is not set
+# CONFIG_DVB_VES1820 is not set
+# CONFIG_DVB_TDA10021 is not set
+# CONFIG_DVB_TDA10023 is not set
+# CONFIG_DVB_STV0297 is not set
+# CONFIG_DVB_NXT200X is not set
+# CONFIG_DVB_OR51211 is not set
+# CONFIG_DVB_OR51132 is not set
+# CONFIG_DVB_BCM3510 is not set
+# CONFIG_DVB_LGDT330X is not set
+# CONFIG_DVB_LGDT3305 is not set
+# CONFIG_DVB_LGDT3306A is not set
+# CONFIG_DVB_LG2160 is not set
+# CONFIG_DVB_S5H1409 is not set
+# CONFIG_DVB_AU8522_DTV is not set
+# CONFIG_DVB_AU8522_V4L is not set
+# CONFIG_DVB_S5H1411 is not set
+# CONFIG_DVB_S921 is not set
+# CONFIG_DVB_DIB8000 is not set
+# CONFIG_DVB_MB86A20S is not set
+# CONFIG_DVB_TC90522 is not set
+# CONFIG_DVB_MN88443X is not set
+# CONFIG_DVB_PLL is not set
+# CONFIG_DVB_TUNER_DIB0070 is not set
+# CONFIG_DVB_TUNER_DIB0090 is not set
+# CONFIG_DVB_DRX39XYJ is not set
+# CONFIG_DVB_LNBH25 is not set
+# CONFIG_DVB_LNBH29 is not set
+# CONFIG_DVB_LNBP21 is not set
+# CONFIG_DVB_LNBP22 is not set
+# CONFIG_DVB_ISL6405 is not set
+# CONFIG_DVB_ISL6421 is not set
+# CONFIG_DVB_ISL6423 is not set
+# CONFIG_DVB_A8293 is not set
+# CONFIG_DVB_LGS8GL5 is not set
+# CONFIG_DVB_LGS8GXX is not set
+# CONFIG_DVB_ATBM8830 is not set
+# CONFIG_DVB_TDA665x is not set
+# CONFIG_DVB_IX2505V is not set
+# CONFIG_DVB_M88RS2000 is not set
+# CONFIG_DVB_AF9033 is not set
+# CONFIG_DVB_HORUS3A is not set
+# CONFIG_DVB_ASCOT2E is not set
+# CONFIG_DVB_HELENE is not set
+# CONFIG_DVB_CXD2099 is not set
+# CONFIG_DVB_SP2 is not set
+CONFIG_FB=y
+CONFIG_FB_CVITEK=m
+# CONFIG_SND_PCM_TIMER is not set
+# CONFIG_SND_SUPPORT_OLD_API is not set
+# CONFIG_SND_PROC_FS is not set
+# CONFIG_SND_DRIVERS is not set
+CONFIG_SND_HDA_PREALLOC_SIZE=1
+# CONFIG_SND_SPI is not set
+# CONFIG_SND_USB is not set
+# CONFIG_HID is not set
+# CONFIG_USB_HID is not set
+CONFIG_USB=y
+CONFIG_USB_DWC2=y
+CONFIG_USB_GADGET=y
+CONFIG_USB_CONFIGFS=m
+CONFIG_USB_CONFIGFS_RNDIS=y
+CONFIG_USB_CONFIGFS_MASS_STORAGE=y
+CONFIG_USB_CONFIGFS_F_UVC=y
+CONFIG_USB_ROLE_SWITCH=y
+CONFIG_USB_CONFIGFS_F_FS=y
+CONFIG_USB_F_FS=y
+
+CONFIG_MMC=y
+CONFIG_MMC_SDHCI=y
+CONFIG_MMC_SDHCI_PLTFM=y
+CONFIG_MMC_SDHCI_CVI=y
+CONFIG_RTC_CLASS=y
+# CONFIG_VIRTIO_MENU is not set
+CONFIG_STAGING=y
+CONFIG_ION=y
+CONFIG_ION_SYSTEM_HEAP=y
+CONFIG_ION_CARVEOUT_HEAP=y
+# CONFIG_IOMMU_SUPPORT is not set
+CONFIG_PWM=y
+CONFIG_SIFIVE_PLIC=y
+CONFIG_ANDROID=y
+# CONFIG_NVMEM_SYSFS is not set
+# CONFIG_MANDATORY_FILE_LOCKING is not set
+CONFIG_MSDOS_FS=y
+CONFIG_VFAT_FS=y
+# CONFIG_PROC_PAGE_MONITOR is not set
+CONFIG_TMPFS=y
+CONFIG_CONFIGFS_FS=y
+CONFIG_JFFS2_FS=y
+CONFIG_JFFS2_FS_WBUF_VERIFY=y
+CONFIG_JFFS2_COMPRESSION_OPTIONS=y
+CONFIG_JFFS2_LZO=y
+CONFIG_SQUASHFS=y
+# CONFIG_SQUASHFS_ZLIB is not set
+CONFIG_SQUASHFS_XZ=y
+# CONFIG_NETWORK_FILESYSTEMS is not set
+CONFIG_NLS_CODEPAGE_437=y
+CONFIG_NLS_ISO8859_1=y
+# CONFIG_CRYPTO_HW is not set
+# CONFIG_XZ_DEC_X86 is not set
+# CONFIG_XZ_DEC_POWERPC is not set
+# CONFIG_XZ_DEC_IA64 is not set
+# CONFIG_XZ_DEC_ARMTHUMB is not set
+# CONFIG_XZ_DEC_SPARC is not set
+CONFIG_PRINTK_TIME=y
+# CONFIG_ENABLE_MUST_CHECK is not set
+CONFIG_DEBUG_FS=y
+# CONFIG_SECTION_MISMATCH_WARN_ONLY is not set
+# CONFIG_FRAME_POINTER is not set
+# CONFIG_DEBUG_MISC is not set
+# CONFIG_SCHED_DEBUG is not set
+# CONFIG_DEBUG_PREEMPT is not set
+# CONFIG_RCU_TRACE is not set
+# CONFIG_FTRACE is not set
+# CONFIG_RUNTIME_TESTING_MENU is not set
+# CONFIG_ALIOS_LOG is not set
+
+# CONFIG_DEBUG_ALIGN_RODATA is not set
+# CONFIG_STRICT_KERNEL_RWX is not set
+CONFIG_CV1835_SYSDMA_REMAP=y
+CONFIG_DW_DMAC_CVITEK=y
+CONFIG_DMADEVICES=y
+CONFIG_DMA_CMA=y
+CONFIG_SOUND=y
+CONFIG_SND=y
+CONFIG_SND_SOC=y
+CONFIG_SND_SOC_CV182XA_CV182XAADC=y
+CONFIG_SND_SOC_CV182XA_CV182XADAC=y
+CONFIG_SND_CV1835_I2S=y
+CONFIG_SND_SOC_CV182XAADC=y
+CONFIG_SND_SOC_CV182XADAC=y
+CONFIG_SND_SOC_CV1835_USE_AUDIO_PLL=y
+CONFIG_CV1835_I2S_SUBSYS=y
+
+CONFIG_SOC_THEAD=y
+CONFIG_COMPAT_32BIT_TIME=y
+CONFIG_I2C_MUX=y
+CONFIG_PINCTRL=y
+CONFIG_UBIFS_FS=y
+CONFIG_SQUASHFS_LZ4=y
+CONFIG_RESET_CONTROLLER=y
+CONFIG_IIO=y
+CONFIG_STRICT_DEVMEM=n
diff --git a/build/boards/cv181x/cv1812cpa_wevb_0006a_spinand/linux/cvitek_cv1812cpa_wevb_0006a_spinand_rls_defconfig b/build/boards/cv181x/cv1812cpa_wevb_0006a_spinand/linux/cvitek_cv1812cpa_wevb_0006a_spinand_rls_defconfig
new file mode 100644
index 000000000..fe0822eff
--- /dev/null
+++ b/build/boards/cv181x/cv1812cpa_wevb_0006a_spinand/linux/cvitek_cv1812cpa_wevb_0006a_spinand_rls_defconfig
@@ -0,0 +1,216 @@
+# CONFIG_SWAP is not set
+CONFIG_SYSVIPC=y
+CONFIG_NO_HZ_IDLE=y
+CONFIG_HIGH_RES_TIMERS=y
+CONFIG_PREEMPT=y
+CONFIG_LOG_BUF_SHIFT=15
+CONFIG_CC_OPTIMIZE_FOR_SIZE=y
+# CONFIG_MULTIUSER is not set
+# CONFIG_SYSFS_SYSCALL is not set
+# CONFIG_FHANDLE is not set
+# CONFIG_BUG is not set
+# CONFIG_BASE_FULL is not set
+# CONFIG_EPOLL is not set
+# CONFIG_SIGNALFD is not set
+# CONFIG_TIMERFD is not set
+# CONFIG_AIO is not set
+# CONFIG_IO_URING is not set
+# CONFIG_ADVISE_SYSCALLS is not set
+# CONFIG_KALLSYMS is not set
+CONFIG_EMBEDDED=y
+# CONFIG_VM_EVENT_COUNTERS is not set
+# CONFIG_SLUB_DEBUG is not set
+CONFIG_FORCE_MAX_ZONEORDER=10
+CONFIG_ARCH_CVITEK=y
+CONFIG_SOC_THEAD=y
+# CONFIG_RISCV_SWIOTLB is not set
+CONFIG_VECTOR=y
+CONFIG_VECTOR_0_7=y
+# CONFIG_RISCV_SBI_V01 is not set
+# CONFIG_COMPAT is not set
+# CONFIG_EFI is not set
+CONFIG_ARCH_CVITEK_CHIP="cv181x"
+CONFIG_ARCH_CV181X_ASIC=y
+# CONFIG_SECCOMP is not set
+# CONFIG_STACKPROTECTOR_STRONG is not set
+CONFIG_COMPAT_32BIT_TIME=y
+# CONFIG_STRICT_KERNEL_RWX is not set
+CONFIG_MODULES=y
+CONFIG_MODULE_FORCE_LOAD=y
+CONFIG_MODULE_UNLOAD=y
+# CONFIG_BLK_DEV_BSG is not set
+# CONFIG_MQ_IOSCHED_DEADLINE is not set
+# CONFIG_MQ_IOSCHED_KYBER is not set
+# CONFIG_COREDUMP is not set
+CONFIG_CMA=y
+CONFIG_NET=y
+CONFIG_PACKET=y
+CONFIG_UNIX=y
+CONFIG_INET=y
+# CONFIG_INET_DIAG is not set
+# CONFIG_IPV6 is not set
+CONFIG_CFG80211=y
+CONFIG_RFKILL=y
+# CONFIG_ETHTOOL_NETLINK is not set
+CONFIG_UEVENT_HELPER=y
+CONFIG_DEVTMPFS=y
+CONFIG_DEVTMPFS_MOUNT=y
+# CONFIG_ALLOW_DEV_COREDUMP is not set
+CONFIG_MTD=y
+CONFIG_MTD_CMDLINE_PARTS=y
+# CONFIG_MTD_OF_PARTS is not set
+CONFIG_MTD_BLOCK=y
+CONFIG_MTD_RAW_NAND=y
+CONFIG_MTD_NAND_PLATFORM=y
+CONFIG_MTD_NAND_CVSNFC=y
+CONFIG_MTD_SPI_NOR=y
+CONFIG_SPI_CVI_SPIF=y
+CONFIG_MTD_UBI=y
+CONFIG_MTD_UBI_BLOCK=y
+CONFIG_NETDEVICES=y
+# CONFIG_NET_CORE is not set
+# CONFIG_NET_VENDOR_ALACRITECH is not set
+# CONFIG_NET_VENDOR_AMAZON is not set
+# CONFIG_NET_VENDOR_AQUANTIA is not set
+# CONFIG_NET_VENDOR_ARC is not set
+# CONFIG_NET_VENDOR_AURORA is not set
+# CONFIG_NET_VENDOR_BROADCOM is not set
+# CONFIG_NET_VENDOR_CADENCE is not set
+# CONFIG_NET_VENDOR_CAVIUM is not set
+# CONFIG_NET_VENDOR_CORTINA is not set
+# CONFIG_NET_VENDOR_EZCHIP is not set
+# CONFIG_NET_VENDOR_HUAWEI is not set
+# CONFIG_NET_VENDOR_INTEL is not set
+# CONFIG_NET_VENDOR_MARVELL is not set
+# CONFIG_NET_VENDOR_MICREL is not set
+# CONFIG_NET_VENDOR_MICROCHIP is not set
+# CONFIG_NET_VENDOR_MICROSEMI is not set
+# CONFIG_NET_VENDOR_NATSEMI is not set
+# CONFIG_NET_VENDOR_NETRONOME is not set
+# CONFIG_NET_VENDOR_NI is not set
+# CONFIG_NET_VENDOR_QUALCOMM is not set
+# CONFIG_NET_VENDOR_RENESAS is not set
+# CONFIG_NET_VENDOR_ROCKER is not set
+# CONFIG_NET_VENDOR_SAMSUNG is not set
+# CONFIG_NET_VENDOR_SEEQ is not set
+# CONFIG_NET_VENDOR_SOLARFLARE is not set
+# CONFIG_NET_VENDOR_SOCIONEXT is not set
+CONFIG_STMMAC_ETH=y
+# CONFIG_DWMAC_GENERIC is not set
+# CONFIG_NET_VENDOR_SYNOPSYS is not set
+# CONFIG_NET_VENDOR_VIA is not set
+# CONFIG_NET_VENDOR_WIZNET is not set
+# CONFIG_USB_NET_DRIVERS is not set
+# CONFIG_WLAN_VENDOR_ADMTEK is not set
+# CONFIG_WLAN_VENDOR_ATH is not set
+# CONFIG_WLAN_VENDOR_ATMEL is not set
+# CONFIG_WLAN_VENDOR_BROADCOM is not set
+# CONFIG_WLAN_VENDOR_CISCO is not set
+# CONFIG_WLAN_VENDOR_INTEL is not set
+# CONFIG_WLAN_VENDOR_INTERSIL is not set
+# CONFIG_WLAN_VENDOR_MARVELL is not set
+# CONFIG_WLAN_VENDOR_MEDIATEK is not set
+# CONFIG_WLAN_VENDOR_MICROCHIP is not set
+# CONFIG_WLAN_VENDOR_RALINK is not set
+CONFIG_RTL8188FU=y
+# CONFIG_WLAN_VENDOR_RSI is not set
+# CONFIG_WLAN_VENDOR_ST is not set
+# CONFIG_WLAN_VENDOR_TI is not set
+# CONFIG_WLAN_VENDOR_ZYDAS is not set
+# CONFIG_WLAN_VENDOR_QUANTENNA is not set
+CONFIG_INPUT=y
+# CONFIG_SERIO is not set
+# CONFIG_VT is not set
+# CONFIG_LEGACY_PTYS is not set
+CONFIG_SERIAL_8250=y
+CONFIG_SERIAL_8250_CONSOLE=y
+CONFIG_SERIAL_8250_NR_UARTS=5
+CONFIG_SERIAL_8250_RUNTIME_UARTS=5
+CONFIG_SERIAL_8250_DW=y
+CONFIG_HW_RANDOM=y
+CONFIG_I2C=y
+CONFIG_I2C_CHARDEV=y
+CONFIG_I2C_MUX=y
+CONFIG_I2C_DESIGNWARE_PLATFORM=y
+CONFIG_SPI=y
+CONFIG_PINCTRL=y
+CONFIG_CVITEK_PINCTRL_CV1835=y
+CONFIG_GPIOLIB=y
+CONFIG_GPIO_SYSFS=y
+CONFIG_GPIO_DWAPB=y
+CONFIG_POWER_RESET=y
+# CONFIG_HWMON is not set
+CONFIG_THERMAL=y
+CONFIG_THERMAL_NETLINK=y
+CONFIG_WATCHDOG=y
+CONFIG_FB=y
+CONFIG_FB_CVITEK=m
+CONFIG_SOUND=y
+CONFIG_SND=y
+# CONFIG_SND_PCM_TIMER is not set
+# CONFIG_SND_SUPPORT_OLD_API is not set
+# CONFIG_SND_PROC_FS is not set
+# CONFIG_SND_DRIVERS is not set
+CONFIG_SND_HDA_PREALLOC_SIZE=1
+# CONFIG_SND_SPI is not set
+# CONFIG_SND_USB is not set
+CONFIG_SND_SOC=y
+CONFIG_SND_SOC_CV182XA_CV182XAADC=y
+CONFIG_SND_SOC_CV182XA_CV182XADAC=y
+CONFIG_SND_CV1835_I2S=y
+CONFIG_SND_SOC_CV182XAADC=y
+CONFIG_SND_SOC_CV182XADAC=y
+CONFIG_SND_SOC_CV1835_USE_AUDIO_PLL=y
+CONFIG_CV1835_I2S_SUBSYS=y
+CONFIG_USB=y
+CONFIG_USB_DWC2=y
+CONFIG_MMC=y
+CONFIG_MMC_SDHCI=y
+CONFIG_MMC_SDHCI_PLTFM=y
+CONFIG_MMC_SDHCI_CVI=y
+CONFIG_RTC_CLASS=y
+CONFIG_DMADEVICES=y
+CONFIG_DW_DMAC_CVITEK=y
+# CONFIG_VIRTIO_MENU is not set
+CONFIG_STAGING=y
+CONFIG_ION=y
+CONFIG_ION_SYSTEM_HEAP=y
+CONFIG_ION_CARVEOUT_HEAP=y
+CONFIG_ION_CMA_HEAP=y
+# CONFIG_IOMMU_SUPPORT is not set
+CONFIG_CV1835_SYSDMA_REMAP=y
+CONFIG_PWM=y
+CONFIG_SIFIVE_PLIC=y
+CONFIG_ANDROID=y
+# CONFIG_FILE_LOCKING is not set
+# CONFIG_DNOTIFY is not set
+CONFIG_VFAT_FS=y
+# CONFIG_PROC_PAGE_MONITOR is not set
+CONFIG_TMPFS=y
+CONFIG_CONFIGFS_FS=y
+CONFIG_JFFS2_FS=y
+CONFIG_SQUASHFS=y
+# CONFIG_SQUASHFS_ZLIB is not set
+CONFIG_SQUASHFS_XZ=y
+# CONFIG_NETWORK_FILESYSTEMS is not set
+CONFIG_NLS_CODEPAGE_437=y
+CONFIG_NLS_ISO8859_1=y
+# CONFIG_CRYPTO_HW is not set
+# CONFIG_XZ_DEC_X86 is not set
+# CONFIG_XZ_DEC_POWERPC is not set
+# CONFIG_XZ_DEC_IA64 is not set
+# CONFIG_XZ_DEC_ARMTHUMB is not set
+# CONFIG_XZ_DEC_SPARC is not set
+CONFIG_DMA_CMA=y
+CONFIG_CMA_SIZE_MBYTES=0
+CONFIG_PRINTK_TIME=y
+# CONFIG_SYMBOLIC_ERRNAME is not set
+# CONFIG_ENABLE_MUST_CHECK is not set
+# CONFIG_FRAME_POINTER is not set
+# CONFIG_DEBUG_MISC is not set
+# CONFIG_SCHED_DEBUG is not set
+# CONFIG_DEBUG_PREEMPT is not set
+# CONFIG_RCU_TRACE is not set
+# CONFIG_FTRACE is not set
+# CONFIG_RUNTIME_TESTING_MENU is not set
+CONFIG_STRICT_DEVMEM=n
diff --git a/build/boards/cv181x/cv1812cpa_wevb_0006a_spinand/memmap.py b/build/boards/cv181x/cv1812cpa_wevb_0006a_spinand/memmap.py
new file mode 100755
index 000000000..fcc097d01
--- /dev/null
+++ b/build/boards/cv181x/cv1812cpa_wevb_0006a_spinand/memmap.py
@@ -0,0 +1,85 @@
+SIZE_1M = 0x100000
+SIZE_1K = 1024
+
+
+# Only attributes in class MemoryMap are generated to .h
+class MemoryMap:
+    # No prefix "CVIMMAP_" for the items in _no_prefix[]
+    _no_prefix = [
+        "CONFIG_SYS_TEXT_BASE"  # u-boot's CONFIG_SYS_TEXT_BASE is used without CPP.
+    ]
+
+    DRAM_BASE = 0x80000000
+    DRAM_SIZE = 256 * SIZE_1M
+
+    # ==============
+    # C906L FreeRTOS
+    # ==============
+    FREERTOS_SIZE = 2 * SIZE_1M
+    # FreeRTOS is at the end of DRAM
+    FREERTOS_ADDR = DRAM_BASE + DRAM_SIZE - FREERTOS_SIZE
+    FSBL_C906L_START_ADDR = FREERTOS_ADDR
+
+    # ==============================
+    # OpenSBI | arm-trusted-firmware
+    # ==============================
+    # Monitor is at the begining of DRAM
+    MONITOR_ADDR = DRAM_BASE
+
+    ATF_SIZE = 512 * SIZE_1K
+    OPENSBI_SIZE = 512 * SIZE_1K
+    OPENSBI_FDT_ADDR = MONITOR_ADDR + OPENSBI_SIZE
+
+    # =========================
+    # memory@DRAM_BASE in .dts.
+    # =========================
+    # Ignore the area of FreeRTOS in u-boot and kernel
+    KERNEL_MEMORY_ADDR = DRAM_BASE
+    KERNEL_MEMORY_SIZE = DRAM_SIZE - FREERTOS_SIZE
+
+    # =================
+    # Multimedia buffer. Used by u-boot/kernel/FreeRTOS
+    # =================
+    ION_SIZE = 75 * SIZE_1M
+    H26X_BITSTREAM_SIZE = 2 * SIZE_1M
+    H26X_ENC_BUFF_SIZE = 0
+    ISP_MEM_BASE_SIZE = 20 * SIZE_1M
+    FREERTOS_RESERVED_ION_SIZE = H26X_BITSTREAM_SIZE + H26X_ENC_BUFF_SIZE + ISP_MEM_BASE_SIZE
+
+    # ION after FreeRTOS
+    ION_ADDR = FREERTOS_ADDR - ION_SIZE
+
+    # Buffers of the fast image are inside the ION buffer
+    H26X_BITSTREAM_ADDR = ION_ADDR
+    H26X_ENC_BUFF_ADDR = H26X_BITSTREAM_ADDR + H26X_BITSTREAM_SIZE
+    ISP_MEM_BASE_ADDR = H26X_ENC_BUFF_ADDR + H26X_ENC_BUFF_SIZE
+
+    assert ISP_MEM_BASE_ADDR + ISP_MEM_BASE_SIZE <= ION_ADDR + ION_SIZE
+
+    # Boot logo is after the ION buffer
+    # Framebuffer uses boot logo's reserved memory
+    BOOTLOGO_SIZE = 1800 * SIZE_1K
+    BOOTLOGO_ADDR = ION_ADDR - BOOTLOGO_SIZE
+    FRAMEBUFFER_SIZE = BOOTLOGO_SIZE
+    FRAMEBUFFER_ADDR = BOOTLOGO_ADDR
+
+    # ===================
+    # FSBL and u-boot-2021
+    # ===================
+    CVI_UPDATE_HEADER_SIZE = SIZE_1K
+    UIMAG_SIZE = 16 * SIZE_1M
+
+    # kernel image loading buffer
+    UIMAG_ADDR = DRAM_BASE + 24 * SIZE_1M
+    CVI_UPDATE_HEADER_ADDR = UIMAG_ADDR - CVI_UPDATE_HEADER_SIZE
+
+    # FSBL decompress buffer
+    FSBL_UNZIP_ADDR = UIMAG_ADDR
+    FSBL_UNZIP_SIZE = UIMAG_SIZE
+
+    assert UIMAG_ADDR + UIMAG_SIZE <= BOOTLOGO_ADDR
+
+    # u-boot's run address and entry point
+    CONFIG_SYS_TEXT_BASE = DRAM_BASE + 2 * SIZE_1M
+    # u-boot's init stack point is only used before board_init_f()
+    CONFIG_SYS_INIT_SP_ADDR = UIMAG_ADDR + UIMAG_SIZE
diff --git a/build/boards/cv181x/cv1812cpa_wevb_0006a_spinand/partition/partition_spinand.xml b/build/boards/cv181x/cv1812cpa_wevb_0006a_spinand/partition/partition_spinand.xml
new file mode 100644
index 000000000..bcb337eb1
--- /dev/null
+++ b/build/boards/cv181x/cv1812cpa_wevb_0006a_spinand/partition/partition_spinand.xml
@@ -0,0 +1,12 @@
+<physical_partition type="spinand">
+    <partition label="fip" size_in_kb="2560" file="fip.bin"/> <!-- uboot 备份 fip，这里至少需要分配2560-->
+    <partition label="BOOT" size_in_kb="4096" file="boot.spinand"/>
+    <partition label="MISC" size_in_kb="384" file="logo.jpg" />
+    <partition label="ENV" size_in_kb="128" file="" />
+    <partition label="ENV_BAK" size_in_kb="128" file="" />
+    <partition label="ROOTFS" size_in_kb="71680" file="rootfs.spinand" />
+    <partition label="SYSTEM" size_in_kb="20480" file="system.spinand" mountpoint="" type="ubifs" />
+    <partition label="CFG" size_in_kb="4096" file="cfg.spinand" mountpoint="/mnt/cfg" type="ubifs" />
+    <partition label="DATA" file="" mountpoint="/mnt/data" type="ubifs" />
+</physical_partition>
+
diff --git a/build/boards/cv181x/cv1812cpa_wevb_0006a_spinand/rootfs_script/clean_rootfs.sh b/build/boards/cv181x/cv1812cpa_wevb_0006a_spinand/rootfs_script/clean_rootfs.sh
new file mode 100755
index 000000000..26692d889
--- /dev/null
+++ b/build/boards/cv181x/cv1812cpa_wevb_0006a_spinand/rootfs_script/clean_rootfs.sh
@@ -0,0 +1,70 @@
+#!/bin/bash
+
+SYSTEM_DIR=$1
+rm -f $SYSTEM_DIR/mnt/system/usr/lib/libz*
+rm -f $SYSTEM_DIR/mnt/system/lib/libz*
+
+rm -f $SYSTEM_DIR/mnt/system/usr/lib/3rd/libcvi*
+rm -f $SYSTEM_DIR/mnt/system/usr/lib/3rd/libmad*
+rm -f $SYSTEM_DIR/mnt/system/usr/lib/3rd/libmp3*
+rm -f $SYSTEM_DIR/mnt/system/usr/lib/3rd/libopencv*
+rm -f $SYSTEM_DIR/mnt/system/usr/lib/libopencv*
+rm -f $SYSTEM_DIR/mnt/system/usr/lib/libcvi_rtsp.so
+rm -f $SYSTEM_DIR/mnt/system/data/install/lib/libcvi_rtsp.so
+rm -f $SYSTEM_DIR/mnt/system/usr/lib/libcvikernel.so
+rm -f $SYSTEM_DIR/mnt/system/usr/lib/*.a
+rm -f $SYSTEM_DIR/mnt/system/usr/lib/libgst*
+rm -f $SYSTEM_DIR/mnt/system/usr/lib/libg*
+rm -f $SYSTEM_DIR/mnt/system/usr/lib/gstreamer-1.0/libgst*
+rm -f $SYSTEM_DIR/mnt/system/data/install/lib/libcrypto.so*
+rm -f $SYSTEM_DIR/mnt/system/data/install/lib/libssl.so*
+rm -f $SYSTEM_DIR/mnt/system/data/install/lib/libcvi_protobuf.so*
+rm -f $SYSTEM_DIR/mnt/system/data/install/lib/libprotobuf-lite.so*
+rm -f $SYSTEM_DIR/mnt/system/usr/lib/libcviai*
+rm -f $SYSTEM_DIR/mnt/system/usr/lib/libcvi_ispd.so*
+rm -f $SYSTEM_DIR/mnt/system/usr/lib/libraw_replay.so*
+rm -f $SYSTEM_DIR/mnt/system/usr/lib/libcvi_ive_tpu.so*
+rm -rf $SYSTEM_DIR/mnt/system/usr/lib/gio
+rm -rf $SYSTEM_DIR/mnt/system/usr/lib/glib*
+rm -rf $SYSTEM_DIR/mnt/system/usr/lib/gstreamer-1.0*
+rm -rf $SYSTEM_DIR/mnt/system/usr/libexec*
+rm -rf $SYSTEM_DIR/mnt/system/usr/bin
+rm -f $SYSTEM_DIR/mnt/system/usr/lib/libcvimath.so
+rm -f $SYSTEM_DIR/mnt/system/usr/lib/libcviruntime.so
+rm -f $SYSTEM_DIR/mnt/system/usr/lib/libcnpy.so
+rm -f $SYSTEM_DIR/mnt/system/usr/lib/libcipher.so
+
+rm -f $SYSTEM_DIR/mnt/system/lib/libcipher.so*
+rm -f $SYSTEM_DIR/mnt/system/lib/libcvi_ispd.so*
+rm -f $SYSTEM_DIR/mnt/system/lib/libraw_replay.so*
+rm -f $SYSTEM_DIR/mnt/system/lib/libmad.so*
+rm -f $SYSTEM_DIR/mnt/system/lib/libmp3*
+rm -f $SYSTEM_DIR/mnt/system/lib/libnanomsg*
+
+#del 3rdparty lib
+#del thttpd/libwebsockets lib
+rm -f $SYSTEM_DIR/mnt/system/lib/libthttpd*
+rm -f $SYSTEM_DIR/mnt/system/lib/libwebsocket*
+if [ $SDK_VER = "uclibc" ]
+then
+    #del opencv lib
+    rm -f $SYSTEM_DIR/mnt/system/lib/libopencv*
+    #del ffmpeg lib
+    rm -f $SYSTEM_DIR/mnt/system/lib/libav*
+    #save /mnt/system/lib/ openssl lib; need by ntpdate/wpa_supplicant
+else
+    #glibc ramdisk(rootfs/common_arm/usr/lib/) has libcrypto.so and libssl.so
+    #del openssl
+    rm -f $SYSTEM_DIR/mnt/system/lib/libssl*
+    rm -f $SYSTEM_DIR/mnt/system/lib/libcrypto*
+fi
+
+rm -rf $SYSTEM_DIR/etc/init.d/S23ntp
+rm -rf $SYSTEM_DIR/bin/ntpd
+
+du -sh $SYSTEM_DIR/* |sort -rh
+du -sh $SYSTEM_DIR/mnt/* |sort -rh
+du -sh $SYSTEM_DIR/mnt/system/* |sort -rh
+du -sh $SYSTEM_DIR/mnt/system/lib/*  |sort -rh
+du -sh $SYSTEM_DIR/mnt/system/data/install/* |sort -rh
+du -sh $SYSTEM_DIR/usr/* |sort -rh
diff --git a/build/boards/cv181x/cv1812cpa_wevb_0006a_spinand/u-boot/cvi_board_init.c b/build/boards/cv181x/cv1812cpa_wevb_0006a_spinand/u-boot/cvi_board_init.c
new file mode 100644
index 000000000..dcf9f757a
--- /dev/null
+++ b/build/boards/cv181x/cv1812cpa_wevb_0006a_spinand/u-boot/cvi_board_init.c
@@ -0,0 +1,15 @@
+int cvi_board_init(void)
+{
+    // PINMUX_CONFIG(PAD_MIPI_TXM1, IIC2_SDA);
+    // PINMUX_CONFIG(PAD_MIPI_TXP1, IIC2_SCL);
+    // PINMUX_CONFIG(PAD_MIPI_TXM0, CAM_MCLK1);
+    // PINMUX_CONFIG(SD1_D3, XGPIOD_18);
+    // PINMUX_CONFIG(SD1_D2, CAM_MCLK0);
+    // PINMUX_CONFIG(PWR_GPIO2, IIC2_SDA);
+    // PINMUX_CONFIG(PWR_GPIO1, IIC2_SCL);
+
+    PINMUX_CONFIG(JTAG_CPU_TCK, XGPIOA_18);
+    PINMUX_CONFIG(JTAG_CPU_TMS, XGPIOA_19);
+    PINMUX_CONFIG(SPK_EN, XGPIOA_15);
+	return 0;
+}
diff --git a/build/boards/cv181x/cv1812cpa_wevb_0006a_spinand/u-boot/cvitek.h b/build/boards/cv181x/cv1812cpa_wevb_0006a_spinand/u-boot/cvitek.h
new file mode 100644
index 000000000..d515dc254
--- /dev/null
+++ b/build/boards/cv181x/cv1812cpa_wevb_0006a_spinand/u-boot/cvitek.h
@@ -0,0 +1,13 @@
+/*
+ *VO control GPIOs
+ */
+#define VO_GPIO_RESET_PORT		portb
+#define VO_GPIO_RESET_INDEX		5
+#define VO_GPIO_RESET_ACTIVE	GPIO_ACTIVE_LOW
+#define VO_GPIO_PWM_PORT		portb
+#define VO_GPIO_PWM_INDEX		4
+#define VO_GPIO_PWM_ACTIVE		GPIO_ACTIVE_HIGH
+#define VO_GPIO_POWER_CT_PORT	portb
+#define VO_GPIO_POWER_CT_INDEX	3
+#define VO_GPIO_POWER_CT_ACTIVE	GPIO_ACTIVE_HIGH
+
diff --git a/build/boards/cv181x/cv1812cpa_wevb_0006a_spinand/u-boot/cvitek_cv1812cpa_wevb_0006a_spinand_defconfig b/build/boards/cv181x/cv1812cpa_wevb_0006a_spinand/u-boot/cvitek_cv1812cpa_wevb_0006a_spinand_defconfig
new file mode 100644
index 000000000..13dd745ff
--- /dev/null
+++ b/build/boards/cv181x/cv1812cpa_wevb_0006a_spinand/u-boot/cvitek_cv1812cpa_wevb_0006a_spinand_defconfig
@@ -0,0 +1,51 @@
+CONFIG_ARM=y
+CONFIG_SYS_MALLOC_F_LEN=0x100000
+CONFIG_NR_DRAM_BANKS=1
+CONFIG_DEFAULT_DEVICE_TREE="cv181x_asic"
+CONFIG_IDENT_STRING=" cvitek_cv181x"
+CONFIG_ARMV8_SET_SMPEN=y
+CONFIG_TARGET_CVITEK_CV181X=y
+CONFIG_DISTRO_DEFAULTS=y
+CONFIG_FIT=y
+# CONFIG_ARCH_FIXUP_FDT_MEMORY is not set
+CONFIG_BOOTDELAY=1
+# CONFIG_DISPLAY_CPUINFO is not set
+# CONFIG_DISPLAY_BOARDINFO is not set
+CONFIG_SYS_PROMPT="cv181x# "
+# CONFIG_CMD_CONSOLE is not set
+# CONFIG_CMD_XIMG is not set
+# CONFIG_CMD_EDITENV is not set
+# CONFIG_CMD_CRC32 is not set
+# CONFIG_CMD_LZMADEC is not set
+# CONFIG_CMD_UNLZ4 is not set
+# CONFIG_CMD_UNZIP is not set
+# CONFIG_CMD_LOADS is not set
+CONFIG_CMD_MMC=y
+# CONFIG_CMD_ITEST is not set
+CONFIG_CMD_CACHE=y
+CONFIG_CMD_CVI_SD_UPDATE=y
+# CONFIG_ISO_PARTITION is not set
+# CONFIG_EFI_PARTITION is not set
+CONFIG_OF_CONTROL=y
+CONFIG_NET_RANDOM_ETHADDR=y
+CONFIG_DM=y
+CONFIG_DM_MMC=y
+CONFIG_MMC=y
+CONFIG_MMC_SDHCI=y
+CONFIG_MMC_SDHCI_SDMA=y
+CONFIG_MMC_SDHCI_CVITEK=y
+CONFIG_MTD=y
+# CONFIG_SPI_FLASH is not set
+# CONFIG_PHY_SMSC is not set
+CONFIG_DM_ETH=y
+CONFIG_ETH_DESIGNWARE=y
+CONFIG_PHY_CVITEK=y
+CONFIG_SYS_NS16550=y
+CONFIG_SPI=y
+CONFIG_LZ4=y
+CONFIG_LZMA=y
+# CONFIG_TOOLS_LIBCRYPTO is not set
+
+CONFIG_MTD_RAW_NAND=y
+CONFIG_NAND_FLASH_CVSNFC_V3=y
+CONFIG_ENV_IS_IN_NAND=y
diff --git a/build/boards/cv181x/cv1812cpa_wevb_0006a_spinand/u-boot/cvitek_cv1812cpa_wevb_0006a_spinand_rls_defconfig b/build/boards/cv181x/cv1812cpa_wevb_0006a_spinand/u-boot/cvitek_cv1812cpa_wevb_0006a_spinand_rls_defconfig
new file mode 100644
index 000000000..92c817c03
--- /dev/null
+++ b/build/boards/cv181x/cv1812cpa_wevb_0006a_spinand/u-boot/cvitek_cv1812cpa_wevb_0006a_spinand_rls_defconfig
@@ -0,0 +1,49 @@
+CONFIG_ARM=y
+CONFIG_SYS_MALLOC_F_LEN=0x2000
+CONFIG_NR_DRAM_BANKS=1
+CONFIG_DEFAULT_DEVICE_TREE="cv181x_asic"
+CONFIG_IDENT_STRING=" cvitek_cv181x"
+CONFIG_ARMV8_SET_SMPEN=y
+CONFIG_TARGET_CVITEK_CV181X=y
+CONFIG_DISTRO_DEFAULTS=y
+CONFIG_FIT=y
+# CONFIG_ARCH_FIXUP_FDT_MEMORY is not set
+CONFIG_BOOTDELAY=1
+CONFIG_SYS_PROMPT="cv181x_c906# "
+# CONFIG_CMD_CONSOLE is not set
+# CONFIG_CMD_XIMG is not set
+# CONFIG_CMD_EDITENV is not set
+# CONFIG_CMD_CRC32 is not set
+# CONFIG_CMD_LZMADEC is not set
+# CONFIG_CMD_UNLZ4 is not set
+# CONFIG_CMD_UNZIP is not set
+# CONFIG_CMD_LOADS is not set
+CONFIG_CMD_MMC=y
+# CONFIG_CMD_ITEST is not set
+CONFIG_CMD_CACHE=y
+CONFIG_CMD_CVI_SD_UPDATE=y
+# CONFIG_ISO_PARTITION is not set
+# CONFIG_EFI_PARTITION is not set
+CONFIG_OF_CONTROL=y
+CONFIG_NET_RANDOM_ETHADDR=y
+CONFIG_DM=y
+CONFIG_DM_MMC=y
+CONFIG_MMC=y
+CONFIG_MMC_SDHCI=y
+CONFIG_MMC_SDHCI_SDMA=y
+CONFIG_MMC_SDHCI_CVITEK=y
+CONFIG_MTD=y
+# CONFIG_SPI_FLASH is not set
+# CONFIG_PHY_SMSC is not set
+CONFIG_DM_ETH=y
+CONFIG_ETH_DESIGNWARE=y
+CONFIG_PHY_CVITEK=y
+CONFIG_SYS_NS16550=y
+CONFIG_SPI=y
+CONFIG_LZ4=y
+CONFIG_LZMA=y
+# CONFIG_TOOLS_LIBCRYPTO is not set
+
+CONFIG_MTD_RAW_NAND=y
+CONFIG_NAND_FLASH_CVSNFC_V3=y
+CONFIG_ENV_IS_IN_NAND=y
diff --git a/build/boards/default/partition/partition_spinand_page_2k.xml b/build/boards/default/partition/partition_spinand_page_2k.xml
index 19b3a7a44..52118af6d 100644
--- a/build/boards/default/partition/partition_spinand_page_2k.xml
+++ b/build/boards/default/partition/partition_spinand_page_2k.xml
@@ -1,4 +1,6 @@
 <physical_partition type="spinand">
+    <!--Uboot will ues 9th block to store a back up of fip.bin.
+    Please keep the first 2.5MB reserved for fip and fip size less than 1.25MB-->
     <partition label="fip" size_in_kb="2560" file="fip.bin"/>
     <partition label="BOOT" size_in_kb="4096" file="boot.spinand"/>
     <partition label="MISC" size_in_kb="384" file="logo.jpg" />
diff --git a/build/boards/default/partition/partition_spinand_page_4k.xml b/build/boards/default/partition/partition_spinand_page_4k.xml
index 6ba09b143..4e497aa50 100644
--- a/build/boards/default/partition/partition_spinand_page_4k.xml
+++ b/build/boards/default/partition/partition_spinand_page_4k.xml
@@ -1,4 +1,6 @@
 <physical_partition type="spinand">
+    <!--Uboot will ues 9th block to store a back up of fip.bin.
+    Please keep the first 5MB reserved for fip and fip size less than 2.5MB-->
     <partition label="fip" size_in_kb="5120" file="fip.bin"/>
     <partition label="BOOT" size_in_kb="8192" file="boot.spinand"/>
     <partition label="MISC" size_in_kb="512" file="logo.jpg" />
diff --git a/build/envsetup_soc.sh b/build/envsetup_soc.sh
index 9e114d688..1a96306e2 100644
--- a/build/envsetup_soc.sh
+++ b/build/envsetup_soc.sh
@@ -333,7 +333,7 @@ function build_sdk()
   CNV_SDK_INSTALL_PATH="$CNV_SDK_INSTALL_PATH" \
   KERNEL_HEADER_PATH="$KERNEL_PATH"/"$KERNEL_OUTPUT_FOLDER"/usr/ \
       scripts/sdk_release.sh
-  test "$?" -ne 0 && print_notice "${FUNCNAME[0]}() failed !!" && popd return 1
+  test "$?" -ne 0 && print_notice "${FUNCNAME[0]}() failed !!" && popd && return 1
   popd
 
   # copy so
diff --git a/build/sensors/sensor_list.json b/build/sensors/sensor_list.json
index 9147cde99..e6bb2d015 100644
--- a/build/sensors/sensor_list.json
+++ b/build/sensors/sensor_list.json
@@ -66,6 +66,7 @@
 		"SMS_SC3335",
 		"SMS_SC3335_SLAVE",
 		"SMS_SC3336",
+		"SMS_SC3336_1L",
 		"SMS_SC2331_1L",
 		"SMS_SC2331_1L_SLAVE",
 		"SMS_SC2331_1L_SLAVE1",